A group of researchers is planning an experiment to test the hypothesis that sle

Question

A group of researchers is planning an experiment to test the hypothesis that sleep deprivation decreases memory retention. All participants will have a practice session in which they memorize words. That night they will sleep in a monitored lab for a specified time that depends on their group. Then each participant will be tested on how many words they remember from the practice session. The researchers are deciding what conditions they should manipulate for the experimental group Q3.7. The table below shows conditions for the control group and three possible experimental groups. Which experimental group should the researchers use to compare to the control group in order to test their hypothesis? Control Group Experimental Group 1 Experimental Group 2 Experimental Group 3 Number of hours of sleep 8 hours 8 hours 4 hours 4 hours Days between practice and testing 1 day 1 day 1 day 3 days Length of practice session 30 minutes 45 minutes 30 minutes 30 minutes O Experimental group 1 O Experimental group 2 O Experimental group 3 O None of the experimental groups are appropriate for testing their hypothesis.

Explanation / Answer

The correct answer will be option (b) experimental group 2 .

Explanation :-

- Here the hypothesis is 'sleep deprivation decreases memory retention.'

- The hypothesis says that there are two things we want to study. One is sleep deprivation and another one is memory retention.

- so we have to choose experimental group on the basis of these two things.

If we consider experimental group 1, they are not sleep deprived because they have slept the 8 hours same with the control group.

If we consider experimental group 2 , they are sleep deprived of 4 hours but there is a gap of 3days between practice and testing. The experimental group and control group should be similar except the duration of sleep they had.

- In experimental group 2, they have 30 minutes of practice cession and they have 1day between practice and test so they are similar with control group except the duration of sleep they had . So group 2 should be choosen to compare the control group to test the hypothesis.

- Hopefully it helps if problems arises plz comment thanks.

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